Formula 707 Fly Deny Spray for Horses, 32-fl oz bottle

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About This Item

Details

  • Fly Deny’s formula repels and kills flies, gnats, and mosquitoes for up to 14 days, keeping your horse comfortable and pest-free.
  • Designed to withstand sweat, rain, and humidity, this advanced spray remains effective even in hot or wet conditions.
  • Made with horse-friendly ingredients, this spray is non-irritating and safe for daily use, providing reliable protection without drying out your horse’s skin or coat.
  • Unlike harsh chemical sprays, Fly Deny has a light, refreshing scent that won’t overpower, making the application more pleasant for both you and your horse.
  • Maximize fly control by pairing with Formula 707 MultiFly Feed-Thru Fly Control (sold separately) to target both adult flies, gnats, and mosquitoes and minimize the overall fly population.

Ingredients

Instructions

Complete Protection Against Flies

Use Fly Deny and MultiFly together to break the fly life cycle for control. Fly Deny spray repels and kills flies, mosquitoes, and gnats for instant relief. MultiFly pellets are a daily feed-through solution that stops flies from reproducing in manure.

The Formula 707 Standard of Excellence

  • Proven fly control solutions
  • Scientifically-backed formulas
  • Made with quality ingredients
  • Reliable excellence for over 75 years

Fly Protection That Lasts

Fly Deny is a water-based formula with 1% cypermethrin for powerful, long-lasting protection. Designed with safety in mind, it creates a 14-day residual barrier against flies, mosquitoes, and gnats, so your horse can stay comfortable and focused.

How to Get the Best Fly Protection

For best results, spray or wipe Fly Deny evenly on your horse’s coat. Focus on areas where flies tend to gather like the legs, belly, and face—avoiding the eyes and mucous membranes. For maximum protection, reapply every 14 days or as needed.

About Formula 707

Horses deserve to live free from the stress of flies and biting pests, so Formula 707 is dedicated to providing reliable solutions. With a deep understanding of equine care, they create products designed to offer lasting protection and comfort.

Shop Formula 707

Questions & Answers

1 Customer Questions


Is this safe for foals?

Answer by ChewyJul 02, 2025
This spray is formulated to be gentle and effective and is safe for foals.
4.1
Rated 4.1 out of 5 stars
15 Ratings

8 Customer Reviews



Rated 5 out of 5 stars
By Sheri on Jun 13, 2025

Fly bites? DENIED!

It works great on both of my boys. Falcon, in particular, gets terrorized constantly by biting flies. He’s a dapple grey with black skin under his coat which seems

It works great on both of my boys. Falcon, in particular, gets terrorized constantly by biting flies. He’s a dapple grey with black skin under his coat which seems to be a magnet for the irritating flying jerks. This spray went on easily and stopped the flies immediately. Even better was that it continued working for the whole day. Every other spray I’ve tried would work for a little while then stop or it would work one day but not the next. Formula 707 Fly Deny has been worth the cost to give my boys some relief.


Rated 5 out of 5 stars
By Allison on Jun 23, 2025

Wonderful Fly Spray

I love this fly spray for every day use. The flies here in NC are BAD and this definitely helps keep them at bay. I like that it can be done in a thicker mist (down

I love this fly spray for every day use. The flies here in NC are BAD and this definitely helps keep them at bay. I like that it can be done in a thicker mist (down the legs especially) but when you shake it and squeeze the trigger, you can get a finer mist. My dramatic horse is super sensitive with fly spray smells and this actually works without smelling crazy!


Rated 5 out of 5 stars
By Hector on Jun 3, 2025

Best fly spray

I love this spray!! It actually lasts a long time which shocked me lol. most sprays smell awful or disappear in an hour but this one smells SO good and it sticks

I love this spray!! It actually lasts a long time which shocked me lol. most sprays smell awful or disappear in an hour but this one smells SO good and it sticks around. used it before a long trail ride and barely had any flies bugging us. definitely keeping this one on hand all summer, might grab another bottle just in case they sell out.


Rated 1 out of 5 stars
By Libby on May 29, 2025

Buyer Beware

I normally wouldn't leave a bad review, but this time is different. If you own horses, you know the suffering they endure with biting flies. I ordered the 707-fly

I normally wouldn't leave a bad review, but this time is different. If you own horses, you know the suffering they endure with biting flies. I ordered the 707-fly spray and without a doubt, it did not work at all. It almost seemed as if the flies got worse after using this product. It is expensive and does not work AT ALL, so PLEASE do not order this product!!!!


Rated 5 out of 5 stars
By Aubrey on Jun 25, 2025

It does its job!!

This is a really good fly spray. At first the spray was kind of narrow, but then I read you should shake it and press the trigger quickly. It worked like a charm

This is a really good fly spray. At first the spray was kind of narrow, but then I read you should shake it and press the trigger quickly. It worked like a charm. It seems to stick to my horses coat well too.


Rated 5 out of 5 stars
By Jonathan on Jun 17, 2025

I was skeptical, but..

This is the only spray that works on my horse. Even after riding, I don't have to coat him in spray again. The sprayer is really nice too!

This is the only spray that works on my horse. Even after riding, I don't have to coat him in spray again. The sprayer is really nice too!


Rated 5 out of 5 stars
By TJ on Jul 20, 2025

Flys be gone

Knocked the flys down and kept them away. Evident the next day it was still working

Knocked the flys down and kept them away. Evident the next day it was still working


Rated 1 out of 5 stars
By Ginny on Jul 1, 2025

NOT EFFECTIVE

This fly spray does not provide any relief for my horses.

This fly spray does not provide any relief for my horses.